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3-acre lake near Essex. The lake tops out around 6 ft. Contours on this water are modeled from its actual shoreline and max depth. Good for finding likely water, never for navigation. Every species below gets its seasonal read from the same numbers driving the chart.
The drawn water covers 3 acres wrapped in 0.3 miles of bank. At index 1.1 the outline is almost a bowl — read the depth changes, not the shoreline. All of it is shallow-zone water — under ~15 ft across the entire basin, so the food chain has the run of the place. Essex claims this one. Its nearest charted neighbour, Crouch Estuary - Inner to Burnham Reach, is 6 mi to the northeast.
Start shallow in spring: brown trout sit in 1 to 6 ft that time of year. They don't go far with the seasons — 2 to 6 ft covers summer, 1 to 6 ft covers winter. The spot to know is Shoreline break, a drop-off in about 3 ft of water that rates prime for brown trout in summer. Warm-month bites cluster around after dark and early morning. Throw a spoon at the thermocline or a deep stickbait (night) until the fish tell you otherwise.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 1 to 6 ft chart-limited; documented 3 to 25 ft | dawn & dusk | Shoreline break (3 ft) | Stickbait off planer boards (shallow), Small spoon along mud lines |
| Summer | 2 to 6 ft chart-limited; documented 25 to 60 ft | night & dawn | Shoreline break (3 ft) | Spoon at the thermocline, Deep stickbait (night) |
| Fall | 1 to 6 ft chart-limited; documented 5 to 30 ft | dusk & dawn | Shoreline break (3 ft) | Jerkbait over gravel, Casting spoon |
| Winter | 1 to 6 ft chart-limited; documented 5 to 35 ft | dawn | Shoreline break (3 ft) | Jigging spoon, Small stickbait (slow) |
When the water first warms, european perch slide up into 2 to 6 ft. There's no big seasonal slide here — summer means 2 to 6 ft, winter 2 to 6 ft. If you only fish one area, make it Shallow bay flat: a weed flat around 3 ft that scores prime in spring. In summer the feeding windows fall in early morning. Keep a drop-shot micro plastics or a small crankbait (perch pattern) rigged through the warm months.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 6 ft chart-limited; documented 3 to 12 ft | midday & dawn | Shallow bay flat (3 ft) | Small jig + curly tail, Inline spinner #1-2 |
| Summer | 2 to 6 ft chart-limited; documented 8 to 28 ft | dawn | Deep basin (5 ft) | Drop-shot micro plastics, Small crankbait (perch pattern) |
| Fall | 2 to 6 ft chart-limited; documented 10 to 33 ft | midday | Deep basin (5 ft) | Jigging spoon (small), Drop-shot on deep flats |
| Winter | 2 to 6 ft chart-limited; documented 12 to 33 ft | midday & dawn | Deep basin (5 ft) | Tungsten jig + maggots, Small balance jig |
Spring northern pike on Blue Lagoon hold shallow, usually 2 to 6 ft. Depth-wise the year is flat: 2 to 6 ft in summer, 2 to 6 ft once it turns cold. The chart's best answer is Shallow bay flat — weed flat, 3 ft, prime for spring. Prime time lands in early morning and the evening. The summer box starts with a bucktail or a weedless spoon over cabbage.
Depth note: when a documented seasonal range extends below this chart, the table shows the deepest mapped working water, not a verified holding depth.
| Season | Depth | Best window | Start at | Go-to baits |
|---|---|---|---|---|
| Spring | 2 to 6 ft chart-limited; documented 2 to 8 ft | midday & dawn | Shallow bay flat (3 ft) | #5 inline spinner, Spoon (red/white) |
| Summer | 2 to 6 ft chart-limited; documented 8 to 20 ft | dawn & dusk | Shallow bay flat (3 ft) | Bucktail, Weedless spoon over cabbage |
| Fall | 2 to 6 ft chart-limited; documented 6 to 18 ft | midday & dawn | Shallow bay flat (3 ft) | Big rubber (Bull Dawg style), Husky-style jerkbait |
| Winter | 2 to 6 ft chart-limited; documented 5 to 15 ft | midday | Shallow bay flat (3 ft) | Tip-ups, Large jigging spoon |
3 pieces of structure are mapped here — Deep basin, around 5 ft, is the deepest of them.
Blue Lagoon is about 6 ft (2 m) deep at its deepest point. The contours here are modeled from the water's real shape and maximum depth, so treat them as a rough guide.
Anglers target brown trout, european perch, northern pike on Blue Lagoon. This isn't a survey of the water — none is published for it — but an informed estimate from the species common to the region, narrowed by this water's depth, size and each species' range.
Shallow bay flat is the top-rated area: a weed flat in about 3 ft of water that rates prime for european perch in spring. Open the map above to see every rated spot for each species and season.
For brown trout, the summer bite is best in after dark and early morning. Each species page section below lists the seasonal windows, and the map shows a live NOW badge when you're inside one.
Crouch Estuary - Inner to Burnham Reach 6 mi · Hanningfield Reservoir 8 mi · Blackwater Estuary - Inner and Middle 15 mi · North Pool, Marsh Work 20 mi · North Pool 20 mi · Colne Estuary 26 mi · North Metropolitan pit 29 mi · Bonnington Lake 29 mi · Bromley Lower Lake 30 mi · Ardleigh Reservoir 30 mi · Bough Beech Reservoir 31 mi · Stour Estuary 37 mi
See how Blue Lagoon stacks up: best northern pike lakes in United Kingdom · best european perch lakes in United Kingdom · best brown trout lakes in United Kingdom
Browse all United Kingdom fishing maps. See every water on DepthScout. How we build these maps. Fish here with a sonar unit that logs? Send us your depth data and we'll improve this chart, credited to you. For fishing guidance only, never navigation.